True Silkies?

Hello I just got a bunch of silkies from a breeder, they are 2-3 weeks old, when I brought them home I started questioning if they were pure silkie, the coloring is way crazy for being blue, splash and buff. I also noticed 3 have single combs not walnut like the rest. They have 5 toes, 2 have tuffs of hair on there head (guessing this is bearded?) some dont have any feathering on there face, are they pure or crossed with something? Pics below.. I can get better closeups later on..

The feathering on their face will probably come in later; I imagine they are just in their "awkward" phase. I see blue and splash, but those brown ones are not buffs. They shouldn't have any black on them if they are buffs. They should DEFINITELY only have walnut combs; that is the real give-away to me that they've got something else mixed in. Maybe someone who knows the colors better will chime in!